209950147 has 4 divisors (see below), whose sum is σ = 229036536. Its totient is φ = 190863760.

The previous prime is 209950129. The next prime is 209950159. The reversal of 209950147 is 741059902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 209950147 - 2¹¹ = 209948099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (209950747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9543178 + ... + 9543199.

It is an arithmetic number, because the mean of its divisors is an integer number (57259134).

Almost surely, 2^209950147 is an apocalyptic number.

209950147 is a deficient number, since it is larger than the sum of its proper divisors (19086389).

209950147 is a wasteful number, since it uses less digits than its factorization.

209950147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19086388.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 209950147 is about 14489.6565521754. The cubic root of 209950147 is about 594.3451562616.

The spelling of 209950147 in words is "two hundred nine million, nine hundred fifty thousand, one hundred forty-seven".